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- W3170771017 endingPage "017" @default.
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- W3170771017 abstract "The early universe may have contained internally thermalized dark sectors that were decoupled from the Standard Model. In such scenarios, the relic dark thermal bath, composed of the lightest particle in the dark sector, can give rise to an epoch of early matter domination prior to Big Bang Nucleosynthesis, which has a potentially observable impact on the smallest dark matter structures. This lightest dark particle can easily and generically have number-changing self-interactions that give rise to cannibal behavior. We consider cosmologies where an initially sub-dominant cannibal species comes to temporarily drive the expansion of the universe, and we provide a simple map between the particle properties of the cannibal species and the key features of the enhanced dark matter perturbation growth in such cosmologies. We further demonstrate that cannibal self-interactions can determine the small-scale cutoff in the matter power spectrum even when the cannibal self-interactions freeze out prior to cannibal domination." @default.
- W3170771017 created "2021-06-22" @default.
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- W3170771017 date "2022-01-01" @default.
- W3170771017 modified "2023-09-30" @default.
- W3170771017 title "Cannibalism's lingering imprint on the matter power spectrum" @default.
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- W3170771017 doi "https://doi.org/10.1088/1475-7516/2022/01/017" @default.
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